Fate of methanol under one-pot artificial photosynthesis condition with metal-loaded TiO2 as photocatalysts

摘要: Abstract The experimental artificial photosynthesis (AP) systems, which have attempted AP by photo-irradiation of single-chamber reactors containing CO2, H2O, and metal-loaded TiO2, received great attention during the last three decades. Such one-pot systems cannot be efficient because catalysts water oxidation sites can oxidize carbon-containing organic fuels more readily than water. Despite this, methanol has been most desired product from such due to its many merits. However, CH4 CO produced as major products under normal conditions (1 bar 1 sun, neutral condition, irradiation wavelength > 350 nm). From a systematic study aimed elucidate fate in with novel metal nanoparticle loaded TiO2 (Mn–TiO2, M = Pd, Pt, Cu Au) catalyst we found that related formaldehyde formic acid are not indicating gaseous should pathways do involve less-reduced intermediates or side products. We also elucidated when is added into system, fifteen different reactions take place shown Scheme 1. reaction initiated photoinduced excitation charge-transfer (CT) band surface, appears UV region, part solar light. These bear potential used for production various compounds.